Example usage for java.util Optional of

Introduction

In this page you can find the example usage for java.util Optional of.

Prototype

public static <T> Optional<T> of(T value)

Source Link

Document

Returns an Optional describing the given non- null value.

Usage

From source file:com.github.horrorho.inflatabledonkey.util.ProcessManager.java

Optional<byte[]> pipe(Process process, InputStream in) throws IOException, InterruptedException {
    try (InputStream decoderIn = process.getInputStream();
            OutputStream decoderOut = process.getOutputStream()) {

        ByteArrayOutputStream out = new ByteArrayOutputStream();

        Thread write = new Thread(() -> copy(in, decoderOut));
        Thread read = new Thread(() -> copy(decoderIn, out));
        write.start();/*from   www  . j a  va2  s  .com*/
        read.start();

        if (!process.waitFor(timeoutMS, TimeUnit.MILLISECONDS)) {
            logger.warn("-- pipe() - timed out");
            // copy threads will shortly exit on exceptions as their streams are closed.
            return Optional.empty();
        }
        read.join(timeoutMS);

        return Optional.of(out.toByteArray());

    } finally {
        if (logger.isWarnEnabled()) {
            error(process);
        }
    }
}

From source file:io.github.lxgaming.teleportbow.commands.AbstractCommand.java

public final Optional<String> getPrimaryAlias() {
    for (String alias : getAliases()) {
        if (StringUtils.isNotBlank(alias)) {
            return Optional.of(alias);
        }//from   w  w  w . java  2s  . c om
    }

    return Optional.empty();
}

From source file:com.netflix.genie.core.services.impl.LocalJobKillServiceImplUnitTests.java

/**
 * Make sure we don't execute any functionality if the job is already not running.
 *
 * @throws GenieException on any error//from w  ww . j  a  va  2 s  . com
 */
@Test
public void wontKillJobIfAlreadyNotRunning() throws GenieException {
    final JobExecution jobExecution = Mockito.mock(JobExecution.class);
    Mockito.when(this.jobSearchService.getJobStatus(ID)).thenReturn(JobStatus.RUNNING);
    Mockito.when(jobExecution.getExitCode()).thenReturn(Optional.of(1));
    Mockito.when(this.jobSearchService.getJobExecution(ID)).thenReturn(jobExecution);

    this.service.killJob(ID);
}

From source file:com.opopov.cloud.image.service.ImageStitchingServiceImpl.java

private Optional<BufferedImage> decompressImage(ResponseEntity<byte[]> resp) {
    if (resp.getStatusCode() != HttpStatus.OK) {
        return Optional.empty();
    }/*w w  w .ja  v a  2  s  .co m*/

    byte[] compressedBytes = resp.getBody();
    try {
        BufferedImage image = ImageIO.read(new ByteArrayInputStream(compressedBytes));
        return Optional.of(image);
    } catch (IOException e) {
        return Optional.empty();
    }
}

From source file:io.knotx.mocks.adapter.MockActionAdapterHandler.java

private Pair<Optional<String>, JsonObject> toTransitionPair(Map.Entry<String, Object> entry) {
    return Pair.of(Optional.of(entry.getKey()), ((JsonObject) entry.getValue()).getJsonObject("response"));
}

From source file:com.ejisto.util.collector.FieldNode.java

public Optional<FieldNode> findClosestParent(MockedField mockedField) {
    final Optional<FieldNode> parent = children.stream().filter(c -> c.isParentOf(mockedField))
            .map(c -> c.findClosestParent(mockedField)).filter(Optional::isPresent).map(Optional::get)
            .findAny();//from  w  ww  .  j  ava  2s.  co  m
    if (parent.isPresent()) {
        return parent;
    }
    return Optional.of(this);
}

From source file:com.amazonaws.service.apigateway.importer.impl.sdk.ApiGatewaySdkApiImporter.java

protected Optional<Resource> getRootResource(RestApi api) {
    for (Resource r : buildResourceList(api)) {
        if ("/".equals(r.getPath())) {
            return Optional.of(r);
        }//from  w w w  .java2  s. c o m
    }
    return Optional.empty();
}

From source file:org.graylog2.indexer.cluster.jest.JestUtils.java

private static List<JsonObject> extractRootCauses(JsonObject jsonObject) {
    return Optional.of(jsonObject).map(json -> asJsonObject(json.get("error")))
            .map(error -> asJsonArray(error.get("root_cause"))).map(Iterable::spliterator)
            .map(x -> StreamSupport.stream(x, false)).orElse(Stream.empty()).map(GsonUtils::asJsonObject)
            .collect(Collectors.toList());
}

From source file:net.hamnaberg.json.Property.java

public static Property template(String name) {
    return value(name, Optional.of(capitalize(name)), Value.NONE);
}

From source file:com.helion3.prism.api.parameters.ParameterTime.java

@Override
public Optional<Pair<String, String>> processDefault(QuerySession session, Query query) {
    String since = Prism.getConfig().getNode("defaults", "since").getString();

    try {//  w  w w  .  jav  a2s . co m
        Date date = DateUtil.parseTimeStringToDate(since, false);
        query.addCondition(FieldCondition.of(DataQueries.Created, MatchRule.GREATER_THAN_EQUAL, date));
        return Optional.of(Pair.of("since", since));
    } catch (Exception e) {
        e.printStackTrace();
    }

    return Optional.empty();
}